@mixin m_btn_style_dark($font_size) {
  background-color: transparent;
  color: #fff;
  font-family: 'Cinzel', serif;
  display: block;
  transition: 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  font-size: $font_size;
  border: none;
  box-shadow: none;
  padding: 1ex;
  &:hover {
    text-shadow: 0 0 14px rgba(255, 107, 55, 0.75),
    0 0 14px rgba(255, 107, 55, 0.75),
    0 0 14px rgba(255, 107, 55, 0.75),
    0 0 14px rgba(255, 107, 55, 0.75),
    0 0 14px rgba(255, 107, 55, 0.75);
  }
}